JPS6036796A - Rotary blade pump - Google Patents

Abstract

A rotary vaned pump has solid vanes of fixed length sliding in a boss mounted for rotation about a longitudinal axis eccentrically displaced from the longitudinal axis of the pump chamber, so as to provide respective pump compartments in the pump chamber which vary cyclically in volume and are arranged to pressurize fluid entering the pump chamber through an inlet opening and discharging from the chamber through an outlet opening. Each leading vane edge that passes over the inlet opening is formed as a shearing knife edge that shear-cuts any cuttable solid material in the entering fluid that is engaged by the edge as it enters the pump chamber through the inlet. Such solid material is thereby cut into pieces which can be handled by the pump without jamming rotation of the rotor. The leading edge of the inlet opening is also formed as a knife edge that cooperates with the vane edge to shear the solid material. The vanes slide radially in the rotor boss and their tips engage the rotor chamber cylindrical interior surface surrounding the longitudinal axis, this surface being formed as a specially calculated face cam permitting the use of the solid constant length vanes.

Description

[Detailed description of the invention] (Industry, 1- field of use) The present invention relates to rotary vane pumps.

BACKGROUND OF THE INVENTION The design and manufacture of rotary vaned pumps has undergone significant development and is widely used in a variety of fields.

(Problem to be solved by the invention) However, if a solid substance is present in the fluid to be pumped, the rotation of the rotor is reduced to IF to stop the motor operation, and in some cases, the pump It may damage the wing +1J, so its uses are limited. In such cases, a filter must be provided on the downstream side of the pump to stop harmful solid materials before they reach the inlet of the pump. However, there are many cases where it is not possible to use such filters, since it is important that solid substances be pumped with the fluid. For example, although sewage is mainly liquid, it contains a high content of solids whose consistency is significantly different, so such filters cannot be used in sewage pumps. As another example, in a device that mechanically separates a meat and bone mixture into its respective components, i.e., meat and bones, the pump captures the l component while allowing the four components to pass through the holes. used to pump the mixture under pressure towards a porous filter that is

Such a device is disclosed, for example, in co-pending US patent application Ser. No. 061,513,487.

(Means for Solving the Problems) An object of the present invention is to provide a novel rotary pump capable of pumping a fluid containing a solid substance while minimizing the possibility that it will become stuck due to solid substances. .

Another object of the invention may be to provide a rotary pump capable of pumping fluids containing solid materials that can be sheared without clogging the solid materials.

The present invention provides a pump casing 10-20 having at least one pump chamber located between an inner circumferential surface 48 and inner surfaces spaced apart from each other in the axial direction; A space U 38 for communication between the inside of the pump chamber and the interior of the pump chamber, and an sill 4.2 provided on one side of the inner surface and communicating with the inside of the pump chamber, and a +tf inside the pump chamber. A rotor 24 of the pump is attached to the +iii casing so as to rotate about an axis, and! iii) At least one Ilx is attached to the rotor so as to rotate together with the rotor about the Sb line.
two pump vanes JIJ, 4.4, wherein the pump vane 44 has an edge formed to engage the inner surface and an edge formed at the 11 end to engage the inner peripheral surface. and the vane accommodates fluid supplied through the pump chamber entry 1138 between the core vane, the inner and outer peripheral surfaces, and the rotor of the pump. at least one pump chamber for discharging fluid through an outlet 1142 of the pump chamber, and furthermore, when the blades of the pump rotate together with the rotor of the pump, the leading edge 50.52 of the A1 vane In a rotary vane pump adapted to traverse the inlet 1-1 opening, The rotary vane pump is characterized in that it is configured as a shearing knife blade for shearing a shearable solid material that engages with the rotary vane pump.

The front face is hollow cut to provide a shearing knife blade, and the edge of the ITI opening (1) facing the shearing knife cooperates with the knife blade to interpose between the core Between the inlets for shearing the solid material [1 formed as a shear blade,

Preferably, the pump vanes further extend on both sides about the axis of the rotor and have two edges formed at 1° with the blades of the shearing knife. The pump vanes have a constant length in the radial direction 'I' and are mounted on the pump rotor so as to be movable in the radial direction. In the pump room, the pump blade is inserted 11 open 1.
The volume of each pump compartment formed by the pump vanes decreases when moving from 1 to 11,
The blade is inserted between the outlets 11 and 13) I t+
The pump chamber is formed around an axis radially displaced from the axis of the rotor so that the volume increases when the pump chamber moves toward The cam surface is adapted to move the vane radially within the rotor as the rotor rotates, with blades formed on the outer ends of the vanes in operative contact with the cam surface.

The rotary vane pump of the present invention also includes a pump casing having at least one pump chamber cut out so as to be located between the inner circumferential surface 48 and the inner surface spaced apart in the force direction. -20.

an opening 11 opening 1138 provided on one side of the inner surface and communicating with the inside of the pump chamber; an opening 11 opening 142 provided on one of the inner surfaces and communicating with the inside of the pump chamber; a rotor 24 of the pump mounted on said casing so as to rotate about an axis in said casing;
and 2 at least one pump vane 44 attached to the rotor so as to rotate together with the rotor about the Ihh line, the pump vane 44 being formed to engage with the inner surface. and an edge formed at an outer end to engage with the inner circumferential surface, and the vane has a
at least one chamber for receiving fluid supplied through the pump chamber inlet 138 between the inner and outer circumferential surfaces and the rotor of the pump and for discharging the fluid through the pump chamber outlet 42; In a rotary vane pump adapted to form two pump compartments, the pop vanes 44 have a constant radial length and are mounted on the rotor for radial movement, and The inner peripheral surface of the pump chamber forms an internal cam surface which, together with edges formed on the outer ends of the vanes in operative contact with the cam surfaces, guide the vanes into the rotor as the rotor rotates. According to a patent, the invention is characterized in that it is adapted to be moved in the radial direction.

EXAMPLE The example shown in Figures 1 and 2 consists of pressing a meat and bone mixture under high pressure against a perforated screen that allows the meat to pass through but retains the bone. A radially vaned M-shaped rotary pump specifically designed for use in a device for mechanically separating meat and bones. The above-described separation device is disclosed in US Patent Application No. 513.487. The pump of this embodiment has a front end with a shaft port 14 at the front end.
Closed 11- by a circular front end plate 12 fixed by
The housing 10 is provided with a housing 10. Front and rear bearing platform plates 16 and 18 are attached to the housing 10 on either side of the hollow cam plate 20, these three plates forming a pump chamber. The rear bearing plate 18 also constitutes the rear end plate of the pump and is retained in the housing by a retaining ring 22 that is screwed into the housing. Pump rotor 24
is arranged in the pump chamber in such a way that it can rotate about its longitudinal axis by means of two cylindrical plain bearings 26 and 28, respectively mounted on bearing plates 1, 16 and 18. It is set up. One end 30 of the rotor shaft is formed with a spline for driving engagement with a suitable rotor stage, and the other end 32 projects from the rear end plate 1B and drives another device connected to the other end. The spline is formed so that

A thrust roller bearing 34 is attached to the end plate 12.

The front end plate 16 is provided with a circumferentially elongated inlet 1136 having an opening 1138 communicating with the pump chamber;
The rear end plate 18 is also provided with a circumferentially elongated outlet 40 having an opening 42 communicating with the pump chamber.
The two openings are arranged so as to be located on completely opposite sides of the rotation axis of the rotor. In this embodiment, two radially extending pump vanes 44 of constant length are used.
are provided, each vane adapted to slide radially within a slot formed radially in the boss of the rotor. Also, the two slots and therefore the two blades are arranged at right angles to the tail.

Both vanes have an axial width such that they fit together without any visible play between the two opposing faces of bearing plates 16 and 18. In addition, both blades have complementary slots (complementary 5lots) that are half the width and elongate in the radial direction.
46 is provided to provide the necessary radial sliding movement within the rotor boss as the rotor rotates about its longitudinal axis.

The vane blades or tips engage the internal cam surface 48 provided by the internal circumferential surface of the hollow cam plate 20 and thus
This inner circumferential surface also serves as the circumferential surface of the pump chamber. The tips of the blades are rounded to facilitate sliding contact as they move along the inner circumferential surface.

The internal cam surface 48 is formed about a longitudinal axis that is parallel to, but displaced from, or so-called eccentric to, the axis of rotation of the rotor and vane, so that when the rotor and vanes rotate, the vanes and the pump The volumes of the separate pump compartments formed between the walls of the chamber are periodically increased. That is, the volume decreases from the inlet to the outlet [1] and increases from the outlet to the inlet. Surface 48 is also. The design ensures that the tips of the vanes are in constant contact with the surface 48 during the rotation of the pump rotor, so that the contents of the pump compartment can be reliably evacuated through the pump from the inlet to the outlet, and the 140 kg Relatively high pump pressures on the order of 2000 psi (/cm') can be easily obtained. The shape of the cam is therefore relatively complex and each point must be calculated individually. A preferred procedure for such calculations is described below.

The leading edge of the vane, which is in sliding contact with the surface of the ring plate 16 and rotates across the inlet opening 1, has the reference numeral 50 (
The knife blade 52 is cut hollow in the section shown in FIG.
is formed. By forming the camming surface 48 as described above, a length of solid vane can be used, which is particularly suitable for providing a hollow cutting portion 50 and a knife blade 52. As one skilled in the art will readily understand, there are limits to the hardness and thickness of solid materials that a feather knife blade can cut; I have no intention of cutting with such a knife blade. However, in this example,
Since the blades have a wall thickness of approximately 12,7 mm (0.5 inch) and the rotor is rotated by a motor of approximately 50 horsepower (hp), solid materials with animal bone-like properties can easily be removed. Such solid material introduced into the pump chamber is cut into pieces of significantly smaller size by the shear blades and conveyed to the respective pump compartment by the vanes before being discharged from the outlet 40. Ru.

The leading edge of the inlet gap 1138 is formed with a protrusion 54 that provides a shearing blade 56 for cutting to shear the shearable material that will be interposed between it and the cutting blade 52. It is designed to cooperate with the blade 52. Therefore,
The pump is capable of passing and reliably pumping mixtures containing various solid materials, such as sewage sewage or a mixture of meat and bones to be separated, without the pump becoming clogged or
Alternatively, there is no danger that the pump will become stuck due to solid material stuck in the blades of the inlet and vanes.

FIG. 3 shows a second embodiment of a pump according to the invention, which pump is not configured to be mechanically integrated directly into another mechanical device. Therefore, the rotor bearing portion 28 is annular and does not have the splined end portion 32 of the above embodiment. bearing·
The plate 18 is held by an end plate 58 which is removably secured to the casing 10 by a pivot clamping port 6o.

Figures 4 and 5 show a third embodiment of the invention in which the inlet 40 is formed axially, but the outlet 40 is formed radially outwardly from the pump. Accordingly, the cam plate 20 is provided with an outlet passage 61 extending in the radial direction.

A fourth embodiment of the invention is shown in FIGS. 6 and 7. In this example, both the inlet 36 and the outlet 1142 are
The cam surface 48 is provided with both openings 38 and 40, which are formed radially relative to the axis of the rotor. Accordingly, a hollow portion 50 (FIG. 7) forming a knife blade 52 is provided at the tip of the vane, and the inlet opening 38 is formed with a projection 54 and a cooperating shearing blade 56.

FIG. 8 is a diagram showing the cam surface 48 and the side surface of one blade 44 that is stopped at one location. This figure shows a rotor centerline φ having a center of rotation 62 and a cam centerline GU having a center of rotation 64. center 62 and 6
4 is the eccentric distance E, which is known. The length L and wall thickness of the blade are also known. The centerline of the vane must pass through the center 62, while the eccentric distance E is directly proportional to the pump's volumetric output and defines the imaginary center of the cam. The blades of the rotor must always seal the space formed between the blades and therefore must be in contact with the cam at both ends at all times and at all locations on the rotor.

The largest arc is arbitrarily chosen to have a constant radius R, which is an arcuate ACB with a center 64 and a chord equal to the length L of the vane. Certain corrections must be made to the length L to account for the width of the blade and the rounded tip of radius W/2. The radius r of the cam, which is a variable measured from the center 64, varies with the angle θ and can be calculated geometrically, but a correct formula solution is not easily obtained. This problem requires a computer to calculate the relatively large number of calculations required to calculate the radius of the cam needed to determine a given manufacturing accuracy determined by the pump's intended use among many factors. It is particularly suitable for solving by iterative methods using .

The angle α between the blade centerline and the radius passing through center 64 is known. Since α+β10 must be 90 degrees, the angle β can be determined if α is known.

Next, the radius r of the cam, which is a variable factor, can be calculated from the following equations (1) and (2).

If the value of r is not within the required tolerance, α must be adjusted and the calculation procedure repeated until it is within the desired error range. Any point of non-constant radius 1- is an ADH, which can be calculated using different θ values.

Another form of rotary vane pump with blades of fixed length,
For example, it is also possible to use a type of pump in which vanes having a maximum surface area parallel to the axis of rotation are added to slots provided in the radial direction of the rotor. The two radially extending blades of each vane engage phase compensating surface cams on the two opposing end walls, and as the rotor rotates, the vanes slide in the slots in the radial direction of the rotor and engage the rotor and stop surface cams. The volume of the chamber formed during this period is changed periodically. The shearing knife blade is provided at the edge across the inlet opening, similar to the embodiment described. However, in a pump having such a configuration, it is necessary to form the two phase correction surface cams accurately and to face each other with the correct spacing, so that the pump is much more expensive than the pump of the above embodiment.

(Effects of the Invention) 3. The rotary vane pump according to the present invention having the configuration described in (2) substantially eliminates the risk of becoming stuck due to clogging of solid substances, and also shears solid substances and reliably and effectively pumps fluids containing solid substances. It is possible to achieve the excellent effect of being able to perform pressure feeding.

[Brief explanation of drawings]

FIG. 1 is a longitudinal section taken along line 1-1 in FIG. 2 showing a first embodiment of the pump according to the present invention, which is used as an intermediate member in a device for mechanically separating meat and bones. Figure 2 is a cross-sectional view taken along the line 2-2 in Figure 1, and Figure 2a is a 2a-2ai line in Figure 2 showing details of the pump in Figures 1 and 2.
FIG. 3 is a longitudinal sectional view of a second embodiment of a pump according to the invention suitable for use as a separate component with an axially arranged inlet and an outlet; FIG. 4 is a sectional view taken along the line 4--4 of FIG. 5 showing a third embodiment of a pump according to the invention having an axial inlet and a radial outlet;
The figure is a sectional view taken along the line 5-5 in Figure 4, and Figure 6 is a sectional view of Input 1 and Exit 1.
A fourth embodiment of the pump according to the present invention is provided in the radial direction.
The figure is a diagram showing the internal cam surface and rotor of a displacement pump and is used to calculate the shape of the cam surface. 10-- Housing, 12... Front end plate, 14...
Axial bottle, 16.18--Bearing plate, 2
0...Cam plate, 22...Retaining ring, 24
... Rotor, 26.28 ... Sliding bearing section, 30.3
2... Shaft end, 34... Thrust roller bearing, 36... Inlet, 38... Opening, 40... Outlet, 42... Opening, 44... Partial vane, 46... Slot, 48/1111 Internal cam surface, 50...Hollow cutting part, 52...Blade, 54...Protrusion, 56ψ...Blade, 58...End plate, 60...Port, 61... Outlet passage, 62.64--Center of rotation.

Claims (1)

[Claims] (1) A pump casing η゛10 having at least one pump chamber located between the inner circumferential surface 48 and an inner surface spaced apart from each other in the axial direction. -20, an opening "142" provided on one of the inner surfaces and communicating with the inside of the pump chamber, and an outlet "142" provided on one of the inner surfaces and communicating with the inside of the pump chamber, a rotor 24 of a pump mounted on the casing so as to rotate about an axis in the pot chamber; and at least one pump mounted on the rotor so as to rotate together with the rotor about the Ihl+ line. The pump blade MJ44 has an edge formed to engage with the inner surface and an edge formed at an outer end to engage with the inner peripheral surface. , and furthermore, the fluid supplied through the inlet 1138 of the pump chamber is supplied between the blade vane Aii, the inner surface and the peripheral surface of the pump, and the rotor of the pump if IIM, and the fluid is Pop〉′Output from the pop room
forming at least one pump compartment that exits IJI via J42, and the leading edge 50.52 of the vane traverses the person 1-1 opening as the vane of the pump rotates with the rotor of the pump. In a rotary vane pump configured as follows: The rotary vane pump is characterized in that it is formed as the blade of a shearing knife that shears the shearable solid material that engages with the front surface. The rotary vane pump according to claim 1, characterized in that it has a hollow cutting part 50 so as to provide a blade.(3) The inlet 11 faces the blade 52 of the shearing knife. The edge 56 of the gate 3B cooperates with the knife blade to shear the solid material sandwiched between it and the knife blade.
(The rotary 14-root pump according to claim 1 or 2, characterized in that the pump is formed with a shear force. (4) The blades 44 of the pump are centered around the axis of the rotor. Rotating vane according to claim 1, 2 or 3 qH, characterized in that it has two edges 52, 54 extending on both sides and formed as shearing knife blades. Pump. (5) The +rJ 44 of the pump described in +iii is driven in the rotor 24 so as to move in the radial direction. As the vanes of the pump chambers move from the outlet opening 42 towards the inlet opening 1138, the volume of each pump compartment formed by the pump vanes decreases; Claim 1, 2, 3, or 4 is formed around an axis that is radially displaced from the axis of the rotor so as to increase. Rotary vane pump. (6) The pump vanes 44 have two edges 52, 54 extending on both sides about the axis of the rotor and are formed as shearing knife blades.
is fixed on the rotor of the pump so as to have a constant length in the radial direction and to move in the direction A, and the inner circumferential surface 48 of the pump chamber constitutes an internal cam surface, and the cam surface is adapted to move the vanes radially within the rotor as the rotor rotates with blades formed on the outer ends of the vanes in operative contact with the cam surface. The rotary vane pump according to Item 1, Item 2, Item 3, Item 4, or Item 5. (7) Comprising two pump blades 44 attached to the rotor 24 of the pump at right angles to each other. , each of the blades having two edges extending on both sides about the axis of the rotor and formed as shearing knife blades 50, 52. The rotary vane pump according to item 1, item 2, item 3, item 4, item 5-I, or item 6. (8) The input 11 opening 1'-438 is provided on one of the inner surfaces, and the The opening 1142 is provided on the other side of the inner surface. The rotary vane pump according to Item 7. (9) The inlet 11 opening [■38 is provided on one of the inner surfaces, and the +: + 1lfl t: + 4.2 is provided on the inner peripheral surface. The rotary vane pump according to claim 1, 2, 3, 4, 5, 6, or 5j, characterized in that: (10) the filling IJ and The outlet opening 38.42 is provided in the inner peripheral surface.
j or the rotary vane pump according to item 7. (11) Pump 5 of at least l−) provided so as to be located between the inner circumferential surface 48 and inner +rlI spaced apart from each other in the axial direction;
0-211, an inlet RS 38 provided on one side of the inner surface and communicating with the inside of the pump chamber, an outlet 142 provided on one of the inner surfaces communicating with the inside of the pump chamber, and the pump a pump rotor 24 attached to the casing to rotate about an axis in a room; and at least one pump vane 44 attached to the rotor to rotate together with the rotor about the axis. , the blade 44 of the pump has an edge formed to engage with the inner surface and an edge formed at an outer end to engage with the inner circumferential surface; The feather and
at least one pump that accommodates fluid supplied via the pump chamber mantle 1138 between the inner and outer circumferential surfaces and the rotor of the pump and discharges the fluid via the pump chamber outlet 42; In a rotary vane pump adapted to form a compartment, the vanes 44 of the pump are mounted on the rotor so as to move a constant radial length in the direction of 1' and half 1'f. The inner circumferential surface of the pump chamber may form an internal cam surface, which cam surface, together with both edges formed on the outer ends of the vanes in operative contact with the force 18 surface, may cause the rotor to rotate. A rotary vane pump characterized in that the vanes are then moved in a radial direction within the rotor. (]2) The pump chamber has a blade of the pump chamber that is
1 Open+: + Moving from 38 towards said outlet opening 42 reduces the volume of each pump compartment formed by said pump vanes and causes said pump vanes to move toward said outlet opening 42.
The rotor is formed around an axis displaced in a radial direction from the axis of the rotor so that the 6' product increases as the rotor moves from the rotor toward the artificial opening 38. 12. The co-rotating vane pump according to item 11. (13) The vanes of the pump are perpendicular to each other [11
Two additional blades are added to the rotor described above, and both blades extend on both sides around the axis of the rotor, and the two blades have a constant length in the radial direction. 13. The rotary vane pump according to claim 11 or 12, wherein the rotary vane pump is mounted on the rotor so as to move in a radial direction. (14) In the pump chamber described in ii, the blade 44 of the pump chamber is connected from the artificial opening 38 to the ITI l5) l r, +
42 L Moving in this direction reduces the volume of each pump compartment formed by the pump vanes so that the pump vanes 44 move from the outlet 11 opening 42 to the man rl 1311
14. The rotary vane pump according to claim 13, wherein the rotary vane pump is formed around an axis that is radially displaced from the axis of the rotor so that the volume increases when moving toward the rotor.